I could peel you could peel she could peel we could peel you could peel they could peel
V-ing form
I could be peeling you could be peeling she could be peeling we could be peeling you could be peeling they could be peeling
Perfect
I could have peeled you could have peeled she could have peeled we could have peeled you could have peeled they could have peeled
V-ing perfect
I could have been peeling you could have been peeling she could have been peeling we could have been peeling you could have been peeling they could have been peeling
Negation
Simple form
I couldn't peel you couldn't peel she couldn't peel we couldn't peel you couldn't peel they couldn't peel
V-ing form
I couldn't be peeling you couldn't be peeling she couldn't be peeling we couldn't be peeling you couldn't be peeling they couldn't be peeling
Perfect
I couldn't have peeled you couldn't have peeled she couldn't have peeled we couldn't have peeled you couldn't have peeled they couldn't have peeled
V-ing perfect
I couldn't have been peeling you couldn't have been peeling she couldn't have been peeling we couldn't have been peeling you couldn't have been peeling they couldn't have been peeling
Interrogative form
Simple form
could I peel? could you peel? could she peel? could we peel? could you peel? could they peel?
V-ing form
could I be peeling? could you be peeling? could she be peeling? could we be peeling? could you be peeling? could they be peeling?
Perfect
could I have peeled? could you have peeled? could she have peeled? could we have peeled? could you have peeled? could they have peeled?
V-ing perfect
could I have been peeling? could you have been peeling? could she have been peeling? could we have been peeling? could you have been peeling? could they have been peeling?
Interro-negative form
Simple form
couldn't I peel? couldn't you peel? couldn't she peel? couldn't we peel? couldn't you peel? couldn't they peel?
V-ing form
couldn't I be peeling? couldn't you be peeling? couldn't she be peeling? couldn't we be peeling? couldn't you be peeling? couldn't they be peeling?
Perfect
couldn't I have peeled? couldn't you have peeled? couldn't she have peeled? couldn't we have peeled? couldn't you have peeled? couldn't they have peeled?
V-ing perfect
couldn't I have been peeling? couldn't you have been peeling? couldn't she have been peeling? couldn't we have been peeling? couldn't you have been peeling? couldn't they have been peeling?